In second period most acidic oxide is formed by

Options

A. F
B. N
C. O
D. Li

Explanation

To determine which element in the second period forms the most acidic oxide, we will analyze the properties of the oxides formed by the elements in the second period: Lithium (Li), Beryllium (Be), Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), and Fluorine (F).

### Step-by-Step Solution:

1. **Identify the Elements in the Second Period:**
The elements in the second period of the periodic table are:
- Lithium (Li)
- Beryllium (Be)
- Boron (B)
- Carbon (C)
- Nitrogen (N)
- Oxygen (O)
- Fluorine (F)

2. **Understand Acidic Oxides:**
Acidic oxides are oxides that react with water to form acids. They typically come from non-metals and have higher electronegativity.

3. **Analyze the Oxides:**
- **Li2O (Lithium Oxide)**: Basic oxide.
- **BeO (Beryllium Oxide)**: Amphoteric oxide.
- **B2O3 (Boron Oxide)**: Acidic oxide.
- **CO2 (Carbon Dioxide)**: Acidic oxide.
- **N2O5 (Dinitrogen Pentoxide)**: Acidic oxide.
- **O2 (Oxygen)**: Not an oxide in this context.
- **F2O (Oxygen Difluoride)**: Acidic oxide.

4. **Compare Acidity:**
- Among the oxides listed, CO2, N2O5, and B2O3 are acidic.
- However, as we move from left to right across the periodic table, the acidity of oxides generally increases due to increasing electronegativity.

5. **Determine the Most Acidic Oxide:**
- Fluorine (F) is the most electronegative element and forms the oxide OF2, which is also acidic.
- Comparing the acidic nature of CO2, N2O5, and OF2, OF2 is the most acidic due to the high electronegativity of fluorine.

6. **Conclusion:**
The most acidic oxide in the second period is formed by Fluorine (F), making option A the correct answer.

### Final Answer:
**The most acidic oxide in the second period is formed by Fluorine (F).**

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